//package com.example.server_engineer.utils;
//
//import javax.servlet.http.HttpServletRequest;
//import java.net.InetAddress;
//import java.net.UnknownHostException;
//
//public class IpUtils {
//
//	public static String getIpAddr(HttpServletRequest request) {
//		String ipAddress = null;
//		try {
//			ipAddress = request.getHeader("x-forwarded-for");
//			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//				ipAddress = request.getHeader("Proxy-Client-IP");
//			}
//			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//				ipAddress = request.getHeader("WL-Proxy-Client-IP");
//			}
//			if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//				ipAddress = request.getRemoteAddr();
//				if ("127.0.0.1".equals(ipAddress)) {
//					// 根据网卡取本机配置的IP
//					InetAddress inet = null;
//					try {
//						inet = InetAddress.getLocalHost();
//					}
//					catch (UnknownHostException e) {
//						e.printStackTrace();
//					}
//					ipAddress = inet.getHostAddress();
//				}
//			}
//			// 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
//			// "***.***.***.***".length()
//			if (ipAddress != null && ipAddress.length() > 15) {
//				// = 15
//				if (ipAddress.indexOf(",") > 0) {
//					ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
//				}
//			}
//		}
//		catch (Exception e) {
//			ipAddress = "";
//		}
//
//		return ipAddress;
//	}
//
//}
